Tractor



FIG. 1 is a top perspective view of a tractor showing our new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a front view thereof; and,

FIG. 7 is a rear view thereof.

The gray shading in the Figures shows outside air inlets and not surface ornamentation.

The oblique shade lines in the Figures show transparency or translucency. 

CLAIM The ornamental design for a tractor, as shown and described. 